Improvement in rotary engines



| M'l'l Num IIHIPH N. PETERS. PMOTO-UTHDGRAPHER. WASHINGTON D C UNITED STATES PATENT OFFICE.

OYRUS AVERY, OF TUNKHANNOCK, PENNSYLVANIA.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 38,721, dated June 2, 1863.

To all whom it may concern.-

Be it known that I, OYRUs AVERY, of Tunkhannock, in thecounty of Wyoming, in the S ate of Pennsylvania, have invented a new and Improved Rotary Engine; and I do hereby declare that the following is a full and exact description thereof', reference being had to the accompanying drawings, and to the letters ot' reference marked thereon.

The nature of my invention consists in the combination of certain parts, by means of which I am enabled greatly to reduce friction due to the working of the valves and the revolving cylinder.`

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A is the bed-plate, made of cast-iron about five-eighths ot'an inch thick and two feet square to be bolted to solid timbcrs.

B is the back part of the shell, one-half an inch thick and thirty inches in diameter, and six inches deep. On the front a iiange projects out two inches to bolt on the front part of the shell. In the centeris a hub sixinches long that makes a bearing for the shaft, and answers as a stuffing-box. On the bottom is a flange running down each side of the center and running back to bolt the shell to the bedplate. A

O is the front part of the shell, being nearly the counterpart of the other.

D is the pulley, twenty inches in diameter and eight inches face.

E is' the shaft of caststeel, two inches in diameter and three feet long, supported at the back end by a column.

F is a circular plate, about twenty-eight inches in diameter inside, two inches wide, and half an inch thick, and of hardened steel and let in between the two anges of the shells B and O. One end of this plate is about six inches wide and the same in length that forms part of the piston.

G is the piston, about four inches by three,

and six inches in length, the sides, plain surfaces, and part of the edges to be loose, so that they can be pressed out by springs. Through the center of the piston is an aperture to let the steam through from the boiler by means of the steam-pipe H.

I is the back part of the cylinder. The inside of the steam-chamberis twenty-two inches in diameter and the outside twenty-eight inches, and two inches deep and one inch thick, of cast-iron, keyed to the shaft E. 0n the inside circle of the chamber are two valves, J J, five inches square and half an inch thick, which drop into recesses in I. The front part of the cylinder is the counterpart of the back, with this difference: The side and end of the steam-chamber is loose, so that it can be pressed up against the piston G and circular plate F.

K is the Iiy, ve inches long, one end made fast to the-valve-stem, and the friction-roller on the other end working loosely in the slotted cam-plate L. Y' This cam-plate is fitted tightin the shell B.

Valves may be let in and worked in and out horizontally through the sides of the steam# chamber by means of a crooked groove. A valve could be made long, passing through the shaft and running from center to center of steam-chamber, and worked by a iiy or part of a circle and a friction-roller.

This engine may be varied in size.

- Figure l is a front view on a level with the eye. Fig. 2 is a side view on a level with the eye. Fig. 3 is an interior view on a level with the eye. Fig.4isa view of the slotted plateL.

I claim- The circular plate F, in combination` with valve J and slot L, or its equivalent, for the purpose specified.

oYRUs AVERY.

Witnesses:

CLARENCE S. BEMRNT, B. FRANKLIN DAY. 

